Preparation of gold/iron oxide composite nanoparticles by a laser soldering method

Recently gold/iron oxide composite nanoparticles have attracted much attention as promising biomedical materials. In this paper, a novel laser soldering method called ´nano-soldering´ is employed to prepare gold/iron oxide composite nanoparticles. The structural properties were examined by X-ray diffractometry (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The photo-transmittance was measured by a UV-visible spectrophotometer. Magnetization and atomic concentration were also evaluated for some samples using supeconducting quantum interference device (SQUID) magnetometer and inductively coupled plasma (ICP) atomic emission spectrometer, respectively.